//import java.util.*;

public class Demo{
    public static void main(String[] args) {
        System.out.println("hello");
//        Scanner reader = new Scanner(System.in);
//        double sum = 0;
//        int m = 0;
//        while (reader.hasNextDouble()) {
//            double x = reader.nextDouble();
//            assert x>100||x<0:"这是一个非法的程序数据";
//            m = m + 1;
//            sum = sum + x;
//        }
//        System.out.printf("%d个数的和为%f\n", m, sum / m);
//        System.out.printf("%d个数的平均值是%f\n", m, sum / m);
    }

}
